| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package org.apache.impala.analysis; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.hadoop.fs.permission.FsAction; |
| import org.apache.impala.authorization.Privilege; |
| import org.apache.impala.catalog.HdfsPartition; |
| import org.apache.impala.catalog.HdfsTable; |
| import org.apache.impala.catalog.Table; |
| import org.apache.impala.catalog.KuduTable; |
| import org.apache.impala.common.AnalysisException; |
| import org.apache.impala.thrift.TAlterTableParams; |
| import org.apache.impala.thrift.TAlterTableSetLocationParams; |
| import org.apache.impala.thrift.TAlterTableType; |
| import org.apache.impala.thrift.TPartitionKeyValue; |
| import com.google.common.base.Function; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Represents an ALTER TABLE [PARTITION partitionSpec] SET LOCATION statement. |
| */ |
| public class AlterTableSetLocationStmt extends AlterTableSetStmt { |
| // max num of partitions printed during error reporting. |
| private static final int NUM_PARTITION_LOG_LIMIT = 3; |
| private final HdfsUri location_; |
| |
| public AlterTableSetLocationStmt(TableName tableName, |
| PartitionSet partitionSet, HdfsUri location) { |
| super(tableName, partitionSet); |
| Preconditions.checkNotNull(location); |
| this.location_ = location; |
| } |
| |
| public HdfsUri getLocation() { return location_; } |
| |
| @Override |
| public TAlterTableParams toThrift() { |
| TAlterTableParams params = super.toThrift(); |
| params.setAlter_type(TAlterTableType.SET_LOCATION); |
| TAlterTableSetLocationParams locationParams = |
| new TAlterTableSetLocationParams(location_.toString()); |
| if (getPartitionSet() != null) { |
| List<List<TPartitionKeyValue>> tPartitionSet = getPartitionSet().toThrift(); |
| Preconditions.checkState(tPartitionSet.size() == 1); |
| locationParams.setPartition_spec(tPartitionSet.get(0)); |
| } |
| params.setSet_location_params(locationParams); |
| return params; |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) throws AnalysisException { |
| super.analyze(analyzer); |
| location_.analyze(analyzer, Privilege.ALL, FsAction.READ_WRITE); |
| |
| Table table = getTargetTable(); |
| Preconditions.checkNotNull(table); |
| if (table instanceof HdfsTable) { |
| HdfsTable hdfsTable = (HdfsTable) table; |
| if (getPartitionSet() != null) { |
| // Targeting a partition rather than a table. |
| List<HdfsPartition> partitions = getPartitionSet().getPartitions(); |
| if (partitions.size() != 1) { |
| // Sort the partitions to get a consistent error reporting. |
| List<HdfsPartition> sortedPartitions = Lists.newArrayList(partitions); |
| Collections.sort(sortedPartitions); |
| List<String> sortedPartitionNames = |
| Lists.transform(sortedPartitions.subList(0, NUM_PARTITION_LOG_LIMIT), |
| new Function<HdfsPartition, String>() { |
| @Override |
| public String apply(HdfsPartition hdfsPartition) { |
| return hdfsPartition.getPartitionName(); |
| } |
| }); |
| throw new AnalysisException(String.format( |
| "Partition expr in set location statements can only match " + |
| "one partition. Too many matched partitions %s %s", |
| Joiner.on(",").join(sortedPartitionNames), |
| sortedPartitions.size() < partitions.size() ? "..." : ".")); |
| } |
| if (partitions.get(0).isMarkedCached()) { |
| throw new AnalysisException(String.format("Target partition is cached, " + |
| "please uncache before changing the location using: ALTER TABLE %s %s " + |
| "SET UNCACHED", table.getFullName(), getPartitionSet().toSql())); |
| } |
| } else if (hdfsTable.isMarkedCached()) { |
| throw new AnalysisException(String.format("Target table is cached, please " + |
| "uncache before changing the location using: ALTER TABLE %s SET UNCACHED", |
| table.getFullName())); |
| } |
| } else if (table instanceof KuduTable) { |
| throw new AnalysisException("ALTER TABLE SET LOCATION is not supported on Kudu " + |
| "tables: " + table.getFullName()); |
| } |
| } |
| } |